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Test of Lorentz invariance with spin precession of ultracold neutrons

  • I. Altarev
  • , C. A. Baker
  • , G. Ban
  • , G. Bison
  • , K. Bodek
  • , M. Daum
  • , P. Fierlinger
  • , P. Geltenbort
  • , K. Green
  • , M. G.D. Van Der Grinten
  • , E. Gutsmiedl
  • , P. G. Harris
  • , W. Heil
  • , R. Henneck
  • , M. Horras
  • , P. Iaydjiev
  • , S. N. Ivanov
  • , N. Khomutov
  • , K. Kirch
  • , S. Kistryn
  • A. Knecht, P. Knowles, A. Kozela, F. Kuchler, M. Kuźniak, T. Lauer, B. Lauss, T. Lefort, A. Mtchedlishvili, O. Naviliat-Cuncic, A. Pazgalev, J. M. Pendlebury, G. Petzoldt, E. Pierre, G. Pignol, G. Quéméner, M. Rebetez, D. Rebreyend, S. Roccia, G. Rogel, N. Severijns, D. Shiers, Yu Sobolev, A. Weis, J. Zejma, G. Zsigmond
  • Technical University of Munich
  • Rutherford Appleton Laboratory
  • University Paris-Sud
  • Friedrich Schiller University Jena
  • Jagiellonian University
  • Paul Scherrer Institut
  • Cluster of Excellence E-conversion
  • Institut Laue-Langevin
  • University of Sussex
  • Johannes Gutenberg University
  • Bulgarian Academy of Sciences
  • Petersburg Nuclear Phys. Inst.
  • Joint Inst. for Nuclear Research
  • University of Zurich
  • University of Fribourg
  • Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences
  • Laboratoire de Physique Subatomique et de Cosmologie Grenoble (LPSC)
  • K.U. Leuven

Research output: Contribution to journalArticlepeer-review

85 Scopus citations

Abstract

A clock comparison experiment, analyzing the ratio of spin precession frequencies of stored ultracold neutrons and Hg199 atoms, is reported. No daily variation of this ratio could be found, from which is set an upper limit on the Lorentz invariance violating cosmic anisotropy field b <2 ×10-20eV (95% C.L.). This is the first limit for the free neutron. This result is also interpreted as a direct limit on the gravitational dipole moment of the neutron |gn|<0.3eV/c2m from a spin-dependent interaction with the Sun. Analyzing the gravitational interaction with the Earth, based on previous data, yields a more stringent limit |gn|<3×10-4eV/c2m.

Original languageEnglish
Article number081602
JournalPhysical Review Letters
Volume103
Issue number8
DOIs
StatePublished - 20 Aug 2009
Externally publishedYes

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